create_membership · Redmine MCP OAuth Server MCP

WHAT IT DOES

What create_membership does on Redmine MCP OAuth Server

AI agents use create_membership to create or update resources in Redmine MCP OAuth Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Redmine MCP OAuth Server environment.

WHY IT NEEDS A POLICY

Why create_membership needs a policy

This tool creates a new membership record, which is a reversible modification of project membership data. It does not delete, execute code, or move money. Severity is medium because adding unauthorized users to projects could grant unintended access, but the blast radius is limited to that project's scope and the action can be undone by removing the membership.

From the tool's definition Tool name and description: 'create_membership' / 'Add a user or group to a Redmine project.' The verb 'Add' and 'create' indicate data modification. Membership records are created but the action is reversible (memberships can be removed).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_membership Rate-limited

create_membership stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_membership": {
      "limits": [
        {
          "counter": "create_membership_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Redmine MCP OAuth Server, so you can run agents against it safely.

FAQ

Questions about create_membership

What does the create_membership tool do? +

Add a user or group to a Redmine project. It is categorised as a Write tool in the Redmine MCP OAuth Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_membership? +

Register the Redmine MCP OAuth Server MCP server in PolicyLayer and add a rule for create_membership: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Redmine MCP OAuth Server. Nothing to install.

What risk level is create_membership? +

create_membership is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create_membership? +

Yes. Add a rate_limit block to the create_membership rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block create_membership completely? +

Set action: deny in the PolicyLayer policy for create_membership. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides create_membership? +

create_membership is provided by the Redmine MCP OAuth Server MCP server (zh/redmine_mcp_py). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.